// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.

package org.jetbrains.kotlin.j2k.ast

import org.jetbrains.kotlin.j2k.CodeBuilder

abstract class Parameter(val identifier: Identifier, val type: Type?) : Element()

class FunctionParameter(
  identifier: Identifier,
  type: Type?,
  private val varVal: VarValModifier,
  val annotations: Annotations,
  val modifiers: Modifiers,
  val defaultValue: DeferredElement<Expression>? = null
) : Parameter(identifier, type) {
    enum class VarValModifier {
        None,
        Val,
        Var
    }

    override fun generateCode(builder: CodeBuilder) {
        builder.append(annotations).appendWithSpaceAfter(modifiers)

        if (type is VarArgType) {
            builder.append("vararg ")
        }

        when (varVal) {
            VarValModifier.Var -> builder.append("var ")
            VarValModifier.Val -> builder.append("val ")
            VarValModifier.None -> {
            }
        }

        builder.append(identifier)

        if (type != null) {
            builder append ":" append type
        }

        if (defaultValue != null) {
            builder append " = " append defaultValue
        }
    }
}

class LambdaParameter(identifier: Identifier, type: Type?) : Parameter(identifier, type) {
    override fun generateCode(builder: CodeBuilder) {
        builder append identifier

        if (type != null) {
            builder append ":" append type
        }
    }
}